UNIVERSIDAD NACIONAL DEL CALLAO ´ FACULTAD DE CIENCIAS NATURALES Y MATEMATICA ´ ESCUELA PROFESIONAL DE MATEMATICA
´ INFORME FINAL DE PRACTICA PRE-PROFESIONAL ´ MODALIDAD DE INVESTIGACION
´ “CATEGOR´IAS Y FUNTORES SOBRE M ODULOS ”
´ ANGELICA MILUZCA VICTORIO CELIS C´odigo: odigo: 031038-K
´ N◦ : 011-2014-CD-EPM-FCNM RESOLUCION
Bellavista - Callao Semestre: Semestre: 2014-A
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A. DATOS GENERALES
A1. DEL ESTUDIANTE
APELLIDOS Y NOMBRES
: Victorio Celis Ang´elica Miluzca
´ DIGO CO
: 031038-K
´N INSTITUCIO
: Universidad Nacional del Callao
FACULTAD
: Ciencias Naturales y matematicas a´ticas
´ CA PROFES ESCUELA ACADEMICA EMI PROFESION IONAL AL : Matem´ Matem´ atica atica T´ITULO
: “CATEGOR´IAS Y FUNTORES ´ SOBRE MODULOS”
´ MICO SEMESTRE ACADE
: 2014-A
A2. DEL PROFESOR ASESOR
APELLIDOS Y NOMBRES
: Fa ja jardo Camp os Ezequiel
´ DIGO CO
: 28 07
´N CATEGOR´IA Y DEDICACI O
: Aso ciado D.E.
´N CONDICIO
: Nombrado
ESPECIALIDAD
: Matematica a´tica
FACULTAD
: Ciencias Naturales y Matematica a´tica
´ A3. DE LA INSTITUCI ON
´N INSTITUCIO
: Universidad nacional del Callao
´N DIRECCIO
: Av. Juan Pablo I I 306, Bellavista-Callao
´ FONO TELE
: (0 51 ) 42 9 717 8
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B. CRONOGRAMA DE ACTIVIDADES REALIZADAS
El desarrollo de la pr´actica actica pre-profesional en la modalidad de investigaci´ on on se realiz´ o como indica el siguiente cronograma semanal de actividades:
Semanas Descripci´on
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Recolecci´on on
x
bibliogr´afica afica M´odulos, odulos, homomorfis-
x x x
mos, suma directas y sucesiones sucesiones exactas Semigrupo Semigrupoides ides,, catecate-
x x x
gor´ıas ıas y funtore funt oress Transf ransform ormaci acione oness
y
x x x
morfismos funtoriales Funtores lineales sobre
x
x
m´odulos odu los,, sat´elites elit es An´alisis de resultados Redacci´on y expo expossici´on on del informe
´ DE LA MONOGRAF´ C. PRESENTACION IA
x
x x
x
x
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´ Indice
I.
RESUMEN
1
´ II. INTRO INTRODUC DUCCI CION
2
´ RICO III. MARCO TE O
3
CAP´ ITULO I: Preliminares . . . . . . . . . . . . . . . . . . . . . . .
3
1.1.
Mo´dulos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
1.2.
Homomorfismo . . . . . . . . . . . . . . . . . . . . . . . . . .
5
1.3.
Prod odu uctos directos y sumas directas . . . . . . . . . . . . . . .
6
1.4.
Mo´dulos libres . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
1.5.
Sucesiones exactas . . . . . . . . . . . . . . . . . . . . . . . .
8
1.6.
Pro ductos tensoriales . . . . . . . . . . . . . . . . . . . . . . .
10
1.7.
Mo´dulos de homomorfismos . . . . . . . . . . . . . . . . . . .
11
1.8.
Mo´dulos proyectivos . . . . . . . . . . . . . . . . . . . . . . .
12
1.9.
Mo´dulo inyectivo . . . . . . . . . . . . . . . . . . . . . . . . .
13
1.10.
Semigrupoides . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
CAP´ ITULO II: Desarrollo del Trabajo de Investigaci´ on . . . . . .
18
2.1.
Categor´ıas . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.
Funtores untores y Transformaciones ransformaciones de Funtores untores o Morfismos Funtoriales untoriales 21
2.3. 2.3.
Fun untor tores es Linea Lineale less sobre sobre M´ odulos
. . . . . . . . . . . . . . . .
27
2.4.
Sat´elites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
´ LISIS DE LOS RESULTADOS IV. IV. ANA
18
49
´N CONCLU CONCLUSIO SIONES NES Y DISC DISCUSI USIO
50
´ FICAS VI. REFERENC REFERENCIAS IAS BIBLIOG BIBLIOGR RA
51
V.
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I. RESUMEN
El objetivo ob jetivo principal de este traba jo consiste en estudiar Categor´ Categor´ıas Algebraicas y Funtores untore s entre Categor Cate gor´´ıas, espec esp ec´´ıficamente ıficame nte Funtores untore s Contravariantes Contravariante s y Covariantes. Aqu´ı dos do s funtor fu ntores es especi esp eciale aless son so n el sat´elite eli te S S 1 contravar co ntravariant iantee y el e l sat´ sa t´elite elit e S 1 covariante, para lo cual usamos nociones de m´odulos, odulos, sucesiones exactas de m´ odulos, odulos, m´odulos odulos proyectivos, m´odulos odulos inyectiv inyectivos os y semigrupoides. semigrupoides. Concluyendo que para todo funtor R- lineal f : M R −→ M R y toda sucesi´on on exacta corta 0 → X → Y → Z → 0 de R-m´odulos, odulos, se tiene asociada la sucesi´ on on semiexacta de sat´ sa t´elit el ites es . . . −→ [S n (f )]( f )](X X ) −→ [S n (f )]( f )](Y Y )) −→ [S n (f )]( f )](Z Z ) −→ [S n−1 (f )]( f )](X X ) −→ . . ., ., para f f contravariante, . . . −→ [S n (f )]( f )](Z Z ) −→ [S n (f )]( f )](Y Y )) −→ [S n (f )]( f )](X X ) −→ [S n−1 (f )]( f )](Z Z ) −→ . . ., ., para f f covariante.
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´ II. INTRODUCCION
En diferentes areas a´reas de la matem´ a tica se presenta el problema de existencia y atica unicidad en tal sentido, la aparici´on on de los funtores se constituye en estos tiempos como una soluci´on on a este problema. En este trabajo presentamos los funtores y sus propiedades de linealidad. En (1.1) introducimos los m´odulos odulos sobre un anillo R. En (1.5) presentamos las sucesiones exactas de m´ odulos y sus propiedades. odulos En (1.8) y (1.9) presentamos los m´ odulos proyectivos e inyectivos. odulos En (1.10) presentamos los semigrupoides y su axiom´ atica. atica. En (2.1) (2 .1) estudiamos est udiamos las categor´ categor´ıas y se da una relaci´ on on de ejemplos. En (2.2) introducimos los funtores y las transformaciones funtoriales. En (2.4) estudiamos los funtores sobre R-m´odulos. odulos. Finalmente en (2.5) estudiamos los sat´elites elites y su asociaci´ aso ciaci´ on con las sucesiones exactas on de m´odulos. odulos. El estudio de los funtores es muy importante, puesto que en la actualidad, mediante estos, se est´an an reso r esolvie lviendo ndo proble pro blemas mas de Topolo Top ologg´ıa Algeb Al gebrai raica, ca, Geomet Geo metrr´ıa, Econom´ Eco nom´ıa ıa y otros, tal es el caso de los funtores en Homotop´ Homotop´ıa y Homolog´ Homolog´ıa.
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´ III. MARCO TEORICO CAP´ ITULO I: Preliminares 1.1.
Modulos o ´dulos
A lo largo del texto, R texto, R denotar´ a un anillo conmutativo con unidad 1 = 0, arbitrariamente riamente dado.
odulo) Un m´ odulo sobre R, o un R-m´ odulo, es un grupo abeDefinici´ on on 1.1.1 (M´ liano aditivo X , juntamente con una funci´ on µ : R : R × X −→ X
del producto cartesiano R × X en X , que satisface las tres condiciones siguientes: (M1) La funci´ on µ es biaditiva; es decir, µ(α + β + β,, x) = µ( µ (α, x) + µ + µ((β, x), µ(α, x + y + y)) = µ( µ (α, x) + µ + µ((α, y )
son ciertas para todo α, β en R y todo x, y en X . (M2) Para cualesquiera α, β en R y x en X , se tiene µ[α, µ(β, x)] = µ( µ (αβ,x) αβ,x).
(M3) Para todo elemento x de X , µ(1, (1, x) = x.
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2. El conjun conjunto to X X = R s de todas las funciones f : S −→ R de un conjunto S en R en R es un grupo abeliano respecto a la adici´ on funcional definida por on (f + g)( g )(ss) = f ( f (s) + g + g((s) para cualquiera f , f , g ∈ X y s ∈ S . La funci´on on µ : R : R × X −→ X. definida asignando a cada elemento (α, (α, f ) f ) de R × X la X la funci´on on αf : S −→ R, dada por (αf )( αf )(ss) = α[ α [f ( f (s)] para todo s todo s ∈ S , satisface las condiones condiones (M1)-(M3). Por ello X ello X es es un R un R-m´ -m´odulo. odulo.
odulo) Un subm´ odulo de X es un subconjunto A no vac´ va c´ıo ıo Definici´ on on 1.1.2 (Subm´ X que es un R R -m´ de X odulo respecto a la adici´ on y la multiplicaci´ on escalar del m´ odulo X . Ejemplo 2
1. Todo subgrupo subgrupo A de un grupo abeliano aditivo X es es un subm´odulo odulo de X considerado como m´ odulo odulo sobre el anillo Z de de los enteros. 2. Consideremos Consideremos el R el R-- m´odulo X odulo X = R s del ejemplo (2) de m´ odulos. odulos. Sea el subcon junto A de X formado X formado por todas las funciones f : S −→ R tales que f ( f (x) = 0 para todos los elementos s elementos s ∈ S salvo salvo a lo m´as as un n´ umero finito de ellos. Entonces umero
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1.2. 1.2.
Homo Homomo morfi rfism smo o
on liDefinici´ on on 1.2.1 (Homomorfismo) Un homomorfismo (o morfismo o aplicaci´ neal) de un R-m´ odulo X en en un R-m´ odulo Y es una funci´ on f : X −→ Y, X en el grupo abeliano aditivo que es un homomorfismo del grupo abeliano aditivo de X Y que conserva la multiplicaci´ de Y on escalar e scalar.. En otros t´erminos ermi nos,, f es un homomorfismo
del m´ odulo X en el m´ odulo Y si y s´ olo si f ( f (u + v + v)) = f ( f (u) + f + f ((v ), f ( f (αu) αu) = αf ( αf (u)
para todo α en R y u, v en X . Definici´ on on 1.2.2 (Monomorfismo, epimorfismo e isomorfismo) Un homomorfismo
h : X −→ Y de un R-m´ odulo X en un R-m´ odulo Y se dice monomorfismo si y
s´ olo si es inyectivo; h se dice epimorfismo si y s´ olo si es suprayectivo (sobre). Un homomorfismo biyectivo (inyectivo y sobre) recibe el nombre de isomorfismo. Dos Rm´ odulos X olo si existe un isomorfismo h : X e Y Y son isomorfos, X ≈ Y , si y s´ h : X X −→ Y . Proposici´ on on 1.2.3 El producto h = hof de dos homomorfismo f : X → Y y g :
odulos es el homomorfismo trivial si y s´ olo si Y → Z de R-m´ I m(f ) f ) ⊂ K er( er (g ).
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Suficiencia. Supongamos I m(f ) f ) ⊂ K er( er (g ). Sea x ∈ X . Entonces, tenemos h(x) = g[f ( f (x)]. Puesto que f ( f (x) ∈ I m(f ) f ) ⊂ K er( er(g ), obtenemos g [f ( f (x)] = 0, y de aqu´ aqu´ı h(x) = 0. Como x es arbitrario, resulta ser h = 0.
1.3. 1.3.
Produ Product ctos os dire direct ctos os y suma sumass direc directa tass
Definici´ on on 1.3.1 (Productos directos y sumas directas) Consideremos una familia
arbitrariamente dada: F
= {X i \ i ∈ M }
de R-m´ odulos X 1 y designemos con P =
X i
i∈M
el producto cartesiano de la familia F definido como en [4]. Por definici´ on, un elemento de P es una funci´ on f : M −→ U
del conjunto M de d e ´ındices ındices en la uni´ on U de los conjuntos X l tal que f ( f (i) ∈ X i para todo i ∈ M . P considerando, para dos elementos f y g de P P , Definamos una operaci´ on binaria en P g : M M → U determinada por la funci´ on f + g : (f + g)( g )(ii) = f ( f (i) + g + g((i) ∈ X i
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para todo i ∈ M . Por otra parte, se define una multiplicaci´ on escalar µ : R : R × P −→ P
asignado a cada α ∈ R y cada f ∈ P el producto escalar µ(α, f ) f ) = αf : M −→ U
dado por (αf )( αf )(ii) = α[ α [f ( f (i)] µ estructura para todo i ∈ M . Se comprueba f´ acilmente que esta multiplicaci´ on escalar µ
al grupo abeliano aditivo P como R -m´ odulo, que es conocido con el nombre de producto directo de la familia dada F de R-m´ odulo X i , i ∈ M . Consideremos ahora el subconjunto S de P P que consiste de todo f ∈ P tal que f ( f (i) = 0 para todo i ∈ M salvo a lo m´ as un n´ umero finito. Evidentemente S es un subm´ odulo de P . Luego S es un R-m´ odulo llamado suma directa de la familia dada F y es designado por S =
X i .
i∈M
Si el conjunto M es finito, entonces P = S . En este caso, el R-m´ odulo P = S puede llamarse bien producto directo o bien suma directa de la familia finita F . Sin embargo, la segunda denominaci´ on es la m´ as extendida, y es la que utilizaremos en lo sucesivo. Para Pa ra todo ´ındi ın dice ce j ∈ M , definamos una funci´ on d : X → S mediante
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para todo f : M → U en P . Evidentemen Evidentemente, te, pk es un homomorfismo del m´ odulo P en el m´ odulo X k llamado proyecci´ on natural del producto directo P en el m´ odulo X k . Adem´ as, su restricci´ on q k = p k | S : S −→ X k
al subm´ odulo S de P a proyecci´ on natural de la suma directa S odulo P se llamar´ S en el m´ X k .
Sea la sucesi´ on de homomorfismos dj
h
p
k X j −→ S −→ P −→ X k ,
: S → P representa el homomorfismo inclusi´ donde h : S on.
1.4.
Modulos o ´dulos libres
odulos libres) Un R-m´ odulo libre sobre un conjunto S es es un RDefinici´ on on 1.4.1 (M´ m´ odulo F juntamente con una funci´ on f : S → F tal que, para toda funci´ on g : S : S → en un R-m´ odulo X , existe un unico ´ homomorfismo h : F X del conjunto S en : F → X del m´ odulo F en el m´ odulo X tal que
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de homomorfismos de R-m´ odulos tal que la imagen del homomorfismo entrante coincide con el n´ ucleo del homomorfismo saliente de todo m´ odulo distinto de los extremos (si existen) de la sucesi´ on. Por ejemplo, en el m´ odulo Y , deber´ a ser I m(f ) f ) = ker(g ker(g ).
una sucesi´ on exacta de la forma f
g
0 −→ X −→ Y −→ Z −→ 0
se llamar´ a sucesi´ on exacta corta. Como ejemplo de sucesi´ on exacta corta, consideremos un subm´ on odulo odulo arbitrario arbitrario E E de un R-m´odulo odulo X X y el m´odulo odulo cociente Q = X/E . Como el homomorfismo inclusi´on on i : E : E → X es es un monomorfismo, la proyecci´ on on natural p natural p : : X X → Q es un epimorfismo, y I m(i) = E = E = ker( p) p), obteni´ obten i´endose endos e una sucesi´ suces i´ on on exacta corta i
p
0 −→ E −→ X −→ Q −→ 0.
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on finita o infinita Definici´ on on 1.5.2 (Sucesiones semiexactas) Una sucesi´ f
g
... −→ X −→ Y −→ Z −→ ...
de homomorfismos de R-m´ odulos se llama semiexacta si y s´ olo si la imagen del homomorfismo entrante est´ a contenida en el n´ ucleo del homomorfismo saliente en todo m´ odulo distinto de los extremos (si existen) de la sucesi´ on. En virtud de (1.2.3), la sucesi´ on es semiexacta si y s´ olo si el producto gof g of de dos homomorfismos cualesquiera consecutivos de la sucesi´ on f y g es el homomorfismo trivial.
Toda sucesi´ sucesion o´n exacta de homomorfismo de R-m´odulos odulos es semiexacta, pero no toda sucesi´ on semiexacta es exacta. Por ejemplo, sea A un subm´ on odulo odulo propio de un R-m´odulo X odulo X ,, es decir, A decir, A = X y A ⊂ X , y sea i sea i : : A A → X el X el homomorfismo inclusi´on. on. Entonces, la sucesi´ on on i
0 −→ A −→ X −→ 0 es semiexacta, pero no exacta.
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tal que, para toda funci´ on bilineal g : A × B −→ X
de A × B en n R-m´ odulo X , existe un unico ´ homomorfismo h : T → X del m´ odulo T en el m´ odulo X que satisface la relaci´ on de conmutatividad hof = g
en el siguiente tri´ angulo: f
A×B g
T
h
X
odulos cualesquiera A y B , Teorema 1.6.2 (Teorema de existencia) Dados dos R-m´ existe un producto tensorial sobre R de A y B . Demostraci´ on. on. Ver Sze-Tsen Hu [5].
1.7.
Modulos o ´dulos de homomorfismos
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definido por (φ on es Φ ( φ + ψ )(x )(x) = φ( φ (x) + ψ (x) para todo x ∈ A. Con esta adici´ Φ , evidentemente, un grupo abeliano. Ahora, para cualesquiera α ∈ R y φ ∈ Φ, consideremos la funci´ on αφ : : A αφ A −→ B αφ)( )(x x) = α(φ(x)) para todo x ∈ A. Mediante la conmutatividad de R, definida por (αφ
se puede f´ acilmente conbrobar que (αφ αφ)) es un homomorfismo de A en B y que la correspondencia (α, φ) → αφ define una multiplicaci´ on escalar : R × Φ −→ Φ µ : R
en el grupo abeliano Φ . Asi, Φ queda estructurado como R -m´ odulo recibiendo el nombre de m´ odulo de los homomorfismos de A en B . El elemento cero de Φ es el homomorfismo trivial 0.
1.8.
Modulos o ´dulos proyectivos
R m´ odulos proyectivos) Un R odulo X se dice proyectivo si y s´ olo Definici´ on on 1.8.1 (M´ R -m´ si, para todo homomorfismo f : X → B y todo epimorfismo g : A → B de R odulos,
existe un homomorfismo h X → A que satisface
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odulo libre es proyectivo. Proposici´ on on 1.8.2 Todo R-m´ Demostraci´ on. on. Ver Sze-Tsen Hu [5].
odulo proyectivo es proyectivo. Proposici´ on on 1.8.3 Todo sumando directo de un R-m´ Demostraci´ on. on. Ver Sze-Tsen Hu [5].
1.9.
Modulo o ´dulo inyectivo
odulo X se dice inyectivo si y s´ olo si, para todo homoDefinici´ on on 1.9.1 Un R-m´ morfismo f : A → X y todo monomorfismo g : A → B de R-m´ odulos, existe un : B → X que satisface homomorfismo h : B
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1.10 1.10..
Semi Semigr grupo upoid ides es
Un semigrupoide es una clase M clase M tal que, para algunos pares α pares α,, β ∈ M est´ est´a definido un producto αβ ∈ M que satisface las dos condiciones de asociatividad siguientes: (CA 1) Para elementos cualesquiera α cualesquiera α,, β , γ de M de M ,, el triple producto α producto α((βγ )est´ βγ )est´a definido si y s´olo olo si (αβ (αβ )γ est´ est´a definido. En el caso en que cualquiera de los dos est´e definido, se cumple la ley asociativa (αβ )γ = α( α (βγ ) βγ ) Este producto triple ser´ a denotado por αβγ . αβγ .
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est´a definido. Entonces, por (AC 1), se deduce que (ξξ (ξξ )α est´a tambi´ t ambi´en en definid defi nido. o. Esto E sto implica que el producto ξξ est´a definido. Como ξ y ξ son identidades, es ξ = ξξ ξ ξ = ξ . lo que prueba (1.10.1). Est´a identidad unica ξ u ´nica ξ de de (1.10.1) recibir´a el nombre de identidad de identidad por por la izquierda la izquierda del del elemento α de M y M y se designar´a con el s´ımbolo ımbo lo λ(α). La correspondencia α → λ( λ (α) define una funci´ on on λ : M : M −→ M del semigrupoide regular M e M en n s´ı mism mi smo. o. An´alogamente, alogamente, tenemos el siguiente lema.
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on o n de λ(ξ ), ), el producto λ(ξ )ξ est´ est´a definido. Demostraci´ on. on. Por definici´ Como λ Como λ((ξ ) y ξ son son identidades, identidades, se sigue que λ que λ((ξ ) = ξ . An´alogamente, alogamente, se puede probar que ρ(ξ ) = ξ , lo que completa la demostraci´ on del Corolario (1.10.3). on
Lema 1.10.4 Si α y β son dos elementos cualesquiera de un semigrupoide regular
a definido si y s´ olo si ρ(α) = λ( M , entonces αβ est´ λ (β ). αβ est´ a definido. Entonces el triple Demostraci´ on. on. Necesidad. Supongamos que αβ producto α[λ(β )β ] = αβ est´a definido. Por (AC 1) tambi´en en est´ a definido [αλ [αλ((β )]β )]β , lo que implica que αλ αλ((β )
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de α si y s´olo olo si αβ = λ(α) y βα = ρ(α). Si α posee un inverso un inverso,, diremos que α es inversible. inversible.
´ Lema 1.10.6 Todo elemento inversible de un semigrupoide regular tiene un unico inverso. γ dos inversos de un elemento inversible arbitrariamente Demostraci´ on. on. Sean β y γ dos dado α dado α de un semigrupoide regular M regular M .. Entonces est´ an an definidos β definidos β α y αγ . αγ . Por tanto, por (AC 2), est´a definido βαγ . βαγ . De las relaciones βαγ = β (αγ ) = βγ β γ (α) = β ,
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CAP´ ITULO II: Desarrollo del Trabajo de Investigaci´ on 2.1.
Categor´ Categor´ıas
Una categ K de elementos llamados objetos y un ca tegor´ or´ıas ıa s C consiste de una clase K semigrupoide regular M regular M de de elementos llamados morfismos justamente justamente con una funci´ on on
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para dar ejemplos ejemplos de categor´ categor´ıas, se debe especificar los objetos y los morfismos de la categor categ or´´ıa, e indicar indic ar c´ omo omo est´an an definidos los productos p roductos de morfismos. mo rfismos. En E n la mayor´ mayor´ıa de los casos, las identidades y las condiciones de asociatividad son obvias.
Ejemplos Ejem plos de categor cate gor´ ´ıas
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(6) La cat catego egor´ıa
L
de sucesione sucesioness descenden descendentes tes sobre sobre R consiste de todas las
sucesiones descendientes de R-m´odulos odulos como objetos y de sus homomorfismos como morfismos. Los productos de morfismos est´ an definidos por composici´ an on on como en (2). An´alogamente, alogamente, se puede definir la cate categgor´ıa U de sucesiones ascendentes sobre R.
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introducida artificialmente en la noci´ on on de categor´ categor´ıa mediante una funci´ on on biyectiva ι. En los ejemplos (2)-(6), (2) -(6), hemos utilizado los t´erminos erminos “la clase de todos los conjuntos” , etc. En la axiom´atica atica usual de la teor´ıa ıa de conjuntos, conj untos, ´estas estas son totalidade tota lidadess ileg´ ileg´ıtimas que deben ser evitadas. Sin embargo, embargo, si adoptamos los axiomas de Godel-Bernays Godel-Bernays-vo -von n
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En virtud de la condici´on on (CF2), un funtor f funtor f est´a completamente determinado por la funci´on f on f ((α) definida para los morfismos α morfismos α de de C unicamente. u ´nica mente. As´ As´ı un funtor covariante f : de
C
→
C en
D es
esencialmente un homomorfismo del semigrupoide de los morfismos
el de los de
D ,
apliquen apliquen en identidades. identidades.
sujeto a la condici´on on de que las identidades (o unidades) se
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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